One hundred and fifty asymptomatic shoulders in 75 schoolchildren were studied. The shoulders were tested for instability and a hyperextensometer was used to assess joint laxity. Signs of instability were found in 57% of the shoulders in boys and 48% in girls; the commonest sign was a positive posterior drawer test which was found in 63 shoulders. A positive sulcus sign was found in 17 shoulder...

Atlantoaxial instability frequently causes extrinsic cervical myelopathy via anterior displacement of the posterior arch of the atlas. However, upper cervical myelopathy resulting from atlantodental osteo-arthritis with the hypertrophic dens due to atlantoaxial instability is very rare. We present a case of upper cervical myelopathy secondary to atlantoaxial instability and atlantodental osteoa...

Excessive abnormal strain or tension on the posterior tibial nerve in feet exhibiting talotarsal instability has been considered one of the possible etiologic factors of tarsal tunnel syndrome. The suggested treatment options in such cases include stabilization of the talotarsal joint complex in a corrected position, which might help minimize the abnormal forces placed on the posterior tibial n...

Cervical laminectomy has been known to cause postlaminectomy kyphosis and instability, often necessitating extensive anterior and posterior procedures with instrumentation for the stabilisation and correction of the deformity. We report a case of spontaneous stabilisation of postlaminectomy cervical kyphosis by anterior longitudinal ossification in the absence of an ossified posterior longitudi...

In neurologically intact patients with isolated tuberculosis of the posterior spinal elements, surgical intervention can be of benefit in select patients by reducing instability, deformity and late complications.

Os odontoideum can lead to atlantoaxial instability, which can be either reducible or a fixed dislocation. We present surgical management in four patients with os odontoideum at our center. Two of these had reducible dislocations and were managed by posterior transarticular screw fixation. Other two had fixed dislocations necessitating posterior decompression and occipitocervical fixation.

BACKGROUND Posterior decompression, instrumentation, and posterolateral fusion are surgical procedures for the treatment of degenerative lumbar diseases. Solid fusion usually causes adjacent problems. This study investigated the clinical outcome and radiographic fate of the L5-S1 segment in patients who underwent posterior instrumented surgery for degenerative lumbar diseases. METHODS From Ja...

BACKGROUND Despite an increased awareness of the condition, the diagnosis, classification, and treatment of recurrent posterior shoulder instability remain challenging. No clear relationship has been established between glenohumeral morphologic characteristics and the risk for posterior shoulder instability or with outcomes after treatment. PURPOSE To examine the structure of the glenoid in a...